. ♪ ♪ this is a stunning work of technology. ♪ this is the 2013 lexus es and the first-ever es hybrid. this is the pursuit of perfection. an8% every 10 years.age 40,d. we can start losing muscle -- wow. wow. but you can help fight muscle loss with exercise and ensure muscle health. i've got revigor. what's revigor? it's the amino acid metabolite, hmb to help rebuild muscle and strength naturally lost over time. [ female announcer ] ensure muscle health has revigor and protein to help protect, preserve, and promote muscle health. keeps you from getting soft. [ major nutrition ] ensure. nutrition in charge! >>> i'm chris cuomo live in boston. for continuing coverage of the boston terror attack. a lot of breaking news out of memphis. paul kevin curtis has been released from custody. the question is, why? there is going to be a news conference at 6:00 p.m. eastern. you can see it live in the situation room with wolf blitzer. but, first, to crime and justice correspondent joe johns. he's tracking this case. so, joe, we have been talking about this today, it is unusual in a case like this w